RSV is a virus that causes the common cold.
Symptoms
Signs and symptoms of respiratory syncytial virus infection most commonly appear about four to six days after exposure to the virus. In adults and older children, RSV usually causes mild cold-like signs and symptoms. These may include:
Congested or runny nose
Dry cough
Low-grade fever
Sore throat
Sneezing
Headache
https://www.mayoclinic.org/diseases-conditions/respiratory-syncytial-virus/symptoms-causes/syc-20353098